求助各位大佬们！linux安装perf 进行到make&&make install时出现recipe for target 'sub-make' failed等

[birdflyw]

BUILD: Doing 'make -j4' parallel build
Warning: Kernel ABI header at 'tools/include/uapi/drm/i915_drm.h' differs from latest version at 'include/uapi/drm/i915_drm.h'
Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h'
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/disabled-features.h' differs from latest version at 'arch/x86/include/asm/disabled-features.h'
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
Warning: Kernel ABI header at 'tools/arch/x86/include/uapi/asm/kvm.h' differs from latest version at 'arch/x86/include/uapi/asm/kvm.h'
Warning: Kernel ABI header at 'tools/arch/powerpc/include/uapi/asm/kvm.h' differs from latest version at 'arch/powerpc/include/uapi/asm/kvm.h'
Warning: Kernel ABI header at 'tools/arch/s390/include/uapi/asm/kvm.h' differs from latest version at 'arch/s390/include/uapi/asm/kvm.h'
Makefile.config:137: *** Error: flex is missing on this system, please install it。 停止。
Makefile.perf:203: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
Makefile:69: recipe for target 'all' failed
make: *** [all] Error 2

始终没有找到解决方案，大佬们求教55555

[h549570564]

Makefile.config:137: *** Error: flex is missing on this system, please install it。 停止。
这里写的很清楚了，没有flex库。
sudo apt-get install flex 试试

[啥也不会的刘先森]

@birdflyw 大神 我出现了一样的问题

[啥也不会的刘先森]

@birdflyw 怎么解决的

[birdflyw]

解决了！谢谢！！